Kotlin Multiplatform (KMP) is JetBrains' technology for sharing Kotlin code between Android, iOS, web, and desktop applications while keeping the UI native on each platform. Use when a user asks to set up a KMP shared module, share business logic, networking or a data layer between Android and iOS, write expect/actual declarations, use Ktor or SQLDelight in commonMain, write a shared ViewModel, test shared code, or migrate a KMP project to Android Gradle Plugin 9.
